# Re: Boolean logic

 Subject: Re: Boolean logic From: "G. Ken Holman" Date: Thu, 29 Dec 2011 11:29:14 -0500
I published some bit testing XSLT code back in February 2001:

http://www.CraneSoftwrights.com/resources/#bittest

Will that help?

. . . . . . . . . . Ken

At 2011-12-29 14:48 +0000, davep wrote:
```Using xslt 2.0
I have a matrix, representing a font file, one bit per glyph.
Example below.
Each bit implies glyph at that position is present (1)
or missing (0)
Each line represents 255 glyphs.
Full matrix 00..ff represents ... a lot of glyphs.```

```E.g. glyph A1 is first row, 6th data group.
I'm looking for a function to test if a particular glyph is present.```

```E.g. Is 0x3A0 present? This is pi, and is present.
My p-code is
Select line:
if n < 100 then 1
if n < 200 then 2
if n < 300 then 3
etc.```

```Having determined which line:
Normalize to 0..FF, n mod 0x100```

```Within a line:
E.g. A1 is the A div 2 = 5, hence 5+1 = 6th group, first bit.
0x21 is  2 div 1 = 1, hence  1 +1 = 1st group, first bit.```

```Question.
Is my logic right (given the problem is as explained - I can't
find an algorithm for font-config, fc-query command).
If not, where is it wrong please?
then, can anyone devise a function
which given the matrix below, and a hex number, e.g. 0xA1,
return the true/false state I.e. the glyph is present or not?```

TIA DaveP

```<glyphs>
<line><base>0000</base><gp>00000000</gp><gp>ffffffff</gp><gp>ffffffff</gp><gp>7fffffff</gp><gp>00000000</gp><gp>ffffdffe</gp><gp>ffffffff</gp><gp>ffffffff</gp></line>
<line><base>0001</base><gp>ffffffff</gp><gp>feffffff</gp><gp>ffffffff</gp><gp>ffffffff</gp><gp>00040000</gp><gp>00818003</gp><gp>00000000</gp><gp>fc300000</gp></line>
<line><base>0002</base><gp>03000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00040000</gp><gp>01850000</gp><gp>3f0000c0</gp><gp>00000008</gp></line>
<line><base>0003</base><gp>00040200</gp><gp>00000008</gp><gp>00000000</gp><gp>44300000</gp><gp>ffffd7f0</gp><gp>fffffffb</gp><gp>44637fff</gp><gp>00000001</gp></line>
<line><base>0004</base><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>000c0000</gp><gp>000000c0</gp></line>
<line><base>001e</base><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>0000003f</gp><gp>ffffffff</gp><gp>ffffffff</gp><gp>03ffffff</gp></line>
<line><base>001f</base><gp>3f3fffff</gp><gp>ffffffff</gp><gp>aaff3f3f</gp><gp>3fffffff</gp><gp>ffffffff</gp><gp>ffdfffff</gp><gp>efcfffdf</gp><gp>7fdcffff</gp></line>
<line><base>0020</base><gp>7fff0bf4</gp><gp>560d0067</gp><gp>00000010</gp><gp>fff10000</gp><gp>00007fff</gp><gp>0000109e</gp><gp>00000000</gp><gp>00000000</gp></line>
<line><base>0021</base><gp>00480020</gp><gp>00004044</gp><gp>fff80000</gp><gp>00000000</gp><gp>00200000</gp><gp>00000100</gp><gp>00000000</gp><gp>00000000</gp></line>
<line><base>0022</base><gp>44068044</gp><gp>00000f80</gp><gp>00000120</gp><gp>00000033</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp></line>
<line><base>0023</base><gp>00010000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp></line>
<line><base>0025</base><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000c02</gp><gp>00008400</gp><gp>00000040</gp></line>
<line><base>00e0</base><gp>00000000</gp><gp>00000000</gp><gp>00000070</gp><gp>00000800</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp></line>
<line><base>00f5</base><gp>07fdffff</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp></line>
<line><base>00f6</base><gp>00000000</gp><gp>fe000000</gp><gp>7fe30007</gp><gp>ffffe7fe</gp><gp>ffffffff</gp><gp>000c3fff</gp><gp>3001ce08</gp><gp>ffffff15</gp></line>
<line><base>00f7</base><gp>00000000</gp><gp>83ff0052</gp><gp>00000000</gp><gp>07ffffff</gp><gp>00000000</gp><gp>81108102</gp><gp>00000000</gp><gp>ff7fffff</gp></line>
<line><base>00fb</base><gp>0000001f</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp></line>
<line><base>00ff</base><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>00000000</gp><gp>10000000</gp></line>
</glyphs>```

regards

```--
Dave Pawson
XSLT XSL-FO FAQ.
http://www.dpawson.co.uk
```

```--
Free 5-hour video lecture: XSLT/XPath 1.0 & 2.0 http://ude.my/uoui9h
Crane Softwrights Ltd.            http://www.CraneSoftwrights.com/s/
G. Ken Holman                   mailto:gkholman@xxxxxxxxxxxxxxxxxxxx

• Boolean logic
• davep - 29 Dec 2011 14:48:27 -0000
• G. Ken Holman - 29 Dec 2011 16:29:49 -0000 <=
• davep - 29 Dec 2011 16:45:25 -0000

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